:root{--theme:#0B3D91;--ink:#172033;--muted:#687386;--line:#e7ebf1;--paper:#f7f9fc;--gold:#c6923e}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.6}a{color:inherit;text-decoration:none}.container{width:min(1180px,calc(100% - 40px));margin:auto}
.topbar{background:#111b2d;color:#dce5f4;font-size:13px}.topbar .container{height:36px;display:flex;align-items:center;justify-content:space-between}.topbar a{color:#fff}.contact{opacity:.9}
.header{background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}.header-inner{height:76px;display:flex;align-items:center;gap:28px}.logo{display:flex;align-items:center;gap:10px;white-space:nowrap;font-weight:800;font-size:19px;color:var(--theme)}.logo img{width:36px;height:36px;object-fit:contain}.main-nav{flex:1}.nav-list{display:flex;align-items:center;justify-content:center;gap:4px;list-style:none;margin:0;padding:0}.nav-item{position:relative}.nav-link{display:block;padding:26px 13px;font-size:14px;font-weight:600;white-space:nowrap}.has-arrow:after{content:"⌄";font-size:12px;margin-left:6px;color:#8993a4}.nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel,.nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{display:block}.dropdown-panel,.mega-menu{display:none;position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%);background:#fff;border:1px solid var(--line);box-shadow:0 18px 45px #10213b1c;border-radius:0 0 12px 12px;padding:20px;min-width:290px}.dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}.dropdown-panel a,.mega-menu a{display:block;padding:8px 10px;font-size:13px}.dropdown-panel a:hover,.mega-menu a:hover{color:var(--theme);background:#f1f5fb;border-radius:6px}.panel-title{font-weight:800;color:var(--theme);padding:0 10px 12px;border-bottom:1px solid var(--line);margin-bottom:10px}.mega-menu{width:680px}.mega-grid{display:grid;grid-template-columns:1.45fr .8fr;gap:22px}.mega-list{display:grid;gap:3px}.mega-card{display:flex!important;gap:10px;align-items:center}.mega-card img{width:40px;height:40px;object-fit:cover;border-radius:7px;background:#eef2f7}.mega-card span{min-width:0}.mega-card b,.mega-card small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mega-card b{font-size:13px}.mega-card small{font-size:11px;color:var(--muted);max-width:260px}.mega-footer{margin-top:12px!important;color:var(--theme);font-weight:700;border-top:1px solid var(--line)}.header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}.member-link{color:var(--theme);font-size:13px;font-weight:700}.open-link{background:var(--theme);color:#fff;border-radius:6px;padding:8px 14px;font-size:13px}.hamburger{display:none;border:0;background:none;padding:8px;cursor:pointer}.hamburger span{display:block;width:23px;height:2px;background:var(--ink);margin:5px 0;transition:.2s}
.drawer-overlay{display:none;position:fixed;inset:0;background:#09142699;z-index:50}.drawer-overlay.open{display:block}.mobile-drawer{position:fixed;right:0;top:0;bottom:0;width:min(360px,88vw);background:#fff;z-index:51;transform:translateX(100%);transition:.25s;overflow:auto;box-shadow:-12px 0 35px #09142626}.mobile-drawer.open{transform:translateX(0)}.drawer-head{height:72px;display:flex;align-items:center;gap:14px;padding:0 20px;border-bottom:1px solid var(--line);font-weight:700}.drawer-head a{margin-left:auto;color:var(--theme);font-size:14px}.drawer-close{border:0;background:none;font-size:28px;color:#718096;cursor:pointer}.drawer-menu{padding:14px 20px}.drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid var(--line);background:none;text-align:left;color:var(--ink);font-size:15px;cursor:pointer}.drawer-toggle:after{content:"＋";float:right;color:var(--muted)}.drawer-toggle.active:after{content:"－"}.drawer-submenu{display:none;padding:5px 0 8px 15px}.drawer-submenu.open{display:block}.drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:13px}
.video-page{padding:58px 0 90px}.page-intro{text-align:center;margin:0 auto 38px;max-width:720px}.eyebrow{color:var(--gold);font-size:13px;font-weight:800;letter-spacing:2px}.page-intro h1{margin:8px 0 12px;font-size:clamp(30px,4vw,48px);line-height:1.2;color:#162947}.page-intro p{margin:0;color:var(--muted)}.category-tabs{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:26px 0 38px}.category-tabs a{padding:9px 18px;border:1px solid #d8e0eb;border-radius:999px;background:#fff;color:#526176;font-size:14px}.category-tabs a:hover,.category-tabs a.active{border-color:var(--theme);background:var(--theme);color:#fff}.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.video-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:.2s;box-shadow:0 5px 18px #15233b08}.video-card:hover{transform:translateY(-4px);box-shadow:0 14px 30px #15233b16}.video-cover{display:block;position:relative;aspect-ratio:16/9;background:#e9eef5;overflow:hidden}.video-cover img{width:100%;height:100%;object-fit:cover}.play-mark{position:absolute;left:18px;bottom:16px;width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:#fff;color:var(--theme);font-size:17px;box-shadow:0 4px 14px #09142633}.duration{position:absolute;right:12px;bottom:12px;background:#111b2dcc;color:#fff;padding:2px 7px;border-radius:4px;font-size:12px}.video-body{padding:18px}.video-body h2{font-size:18px;line-height:1.4;margin:0 0 8px;color:#1e3151}.video-body p{margin:0 0 14px;color:var(--muted);font-size:14px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.video-meta{display:flex;justify-content:space-between;align-items:center;color:#8a95a5;font-size:12px}.video-meta a{color:var(--theme);font-weight:700}.pagination{display:flex;justify-content:center;gap:8px;margin-top:45px;flex-wrap:wrap}.pagination a{min-width:36px;padding:7px 12px;text-align:center;border:1px solid #d8e0eb;border-radius:6px;background:#fff;color:#536176;font-size:13px}.pagination a.current,.pagination a:hover{background:var(--theme);color:#fff;border-color:var(--theme)}
.footer{background:#111b2d;color:#bac6d8;padding:52px 0 20px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:38px}.footer strong{font-size:20px;color:#fff}.footer h3{font-size:15px;color:#fff;margin:0 0 14px}.footer p{font-size:13px;line-height:1.8;margin:12px 0}.footer-grid>div>a{display:block;font-size:13px;padding:4px 0}.footer-grid>div>a:hover{color:#fff}.footer-bottom{border-top:1px solid #ffffff1c;margin-top:35px;padding-top:18px;text-align:center;font-size:12px;color:#8e9caf}
@media(max-width:980px){.main-nav{display:none}.header-inner{justify-content:space-between}.hamburger{display:block}.member-link{display:none}.mega-menu{display:none!important}.video-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.container{width:min(100% - 28px,1180px)}.topbar .container{height:auto;min-height:38px;gap:8px;flex-wrap:wrap;padding:7px 0}.contact{font-size:12px}.header-inner{height:66px}.open-link{padding:7px 11px}.video-page{padding:40px 0 65px}.video-grid{grid-template-columns:1fr;gap:18px}.page-intro h1{font-size:32px}.footer-grid{grid-template-columns:1fr;gap:24px}.category-tabs{justify-content:flex-start}.category-tabs a{font-size:13px;padding:7px 13px}}